<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="test">
    <input type="text" v-model="searchName">
    <ul>
        <li v-for="(p,index) in filterPersons" :key="index">
            {{index}}--{{p.name}}--{{p.age}}
        </li>
    </ul>
    <button @click="setOrderType(1)">年龄升序</button>
    <button @click="setOrderType(2)">年龄降序</button>
    <button @click="setOrderType(0)">原本顺序</button>
</div>
<script type="text/javascript" src="../js/vue.js"></script>
<script type="text/javascript">
    new Vue({
        el: "#test",
        data: {
            searchName: "",
            orderType: 0,//0代表原本，1代表升序，2代表降序
            persons: [
                {name: "Tom", age: 18},
                {name: "Jack", age: 16},
                {name: "Bob", age: 19},
                {name: "Rose", age: 17}
            ]
        },
        computed: {
            filterPersons(){
                //取出相关的数据
                const {searchName,persons,orderType} = this;
                //最终需要显示的数组
                let fPersons;
                //对persons进行过滤
                fPersons = persons.filter(p => p.name.indexOf(searchName)!==-1 );
                //排序
                if(orderType!==0){
                    fPersons.sort(function(p1,p2){ //如果返回负数，p1在前，返回正数p2在前
                        //1代表升序，2代表降序
                        if(orderType===2){
                            return p2.age-p1.age;
                        } else {
                            return p1.age-p2.age;
                        }
                    });
                }
                return fPersons;
            }
        },
        methods: {
            setOrderType(orderType){
                this.orderType = orderType;
            }
        }
    })

</script>
</body>
</html>